9514 1404 393
Explanation:
The problem statement tells you the meaning of t. It is minutes after Riko leaves. 0 ≤ t < 52.5 is the answer to the question regarding the interval Riko is behind Yuto. It means Riko is behind Yuto for 52.5 minutes after she leaves their house.
t will not be negative because time moves forward. Here, we're only counting time <em>after Riko leaves the house</em>. A negative value for t would refer to a time before Riko leaves the house, which is irrelevant in this problem.*
_____
* One might argue that Riko is behind Yuto for all values of time <em>after Yuto leaves the house</em>, which would be for -21 < t < 52.5. The concept of "behind Yuto" has no meaning except in that interval.
The answer is around 80.17
Answer:
420 seconds
Step-by-step explanation:
(60 seconds in a minute, 60 x 7 = 420)
#Nova
Answer:
240
Step-by-step explanation:
1.) 60 times 2
There are 60 minutes in a hour and since there are 2 germs in the jar.
2.) 120 times 2
120 from the total, and 2 germs are made every minute, you multiply.
